19 january 2012 superseding. Detail specification. Primer, epoxy coating, corrosion inhibiting. Lead and chromate free. The purpose of this testing of Lifetime Tool and Building Products' “Ultimate PrPe Flashing” in accordance with the following testing standards: 1.) Corrosion resistance in a controlled corrosive environment in accordance with ASTM B-l 17. Corel Draw X7 Download Portugues Crackeado Mega. 09 “Standard Practice for Operating Salt Spray (Fog) Apparatus”. Ultimate Pipe.

The salt spray (or salt fog) test is a standardized and popular test method, used to check corrosion resistance of materials and surface. Usually, the materials to be tested are (although stone, ceramics, and polymers may also be tested) and finished with a surface coating which is intended to provide a degree of protection to the underlying metal. Salt spray testing is an accelerated corrosion test that produces a corrosive attack to coated samples in order to evaluate (mostly comparatively) the suitability of the coating for use as a protective finish. The appearance of corrosion products ( or other oxides) is evaluated after a pre-determined period of time. Test duration depends on the corrosion resistance of the coating; generally, the more corrosion resistant the coating is, the longer the period of testing before the appearance of corrosion/ rust. The salt spray test is one of the most widespread and long established corrosion tests.

B117 was the first internationally recognized salt spray standard, originally published in 1939. Other important relevant standards are 9227, Z 2371 and G85. Contents • • • • • • • • • Application [ ] Salt spray testing is popular because it is relatively inexpensive, quick, well standardized, and reasonably repeatable. Although there may be a weak correlation between the duration in salt spray test and the expected life of a in certain coatings such as hot dip, this test has gained worldwide popularity due to low cost and quick results. Most Salt Spray Chambers today are being used NOT to predict the corrosion resistance of a coating, but to maintain coating processes such as pre-treatment and painting, electroplating, galvanizing, and the like, on a comparative basis. For example, pre-treated + painted components must pass 96 hours Neutral Salt Spray, to be accepted for production.

Failure to meet this requirement implies instability in the chemical process of the pre-treatment, or the paint quality, which must be addressed immediately, so that the upcoming batches are of the desired quality. The longer the accelerated corrosion test, the longer the process remains out of control, and larger is the loss in the form of non-conforming batches. The principle application of the salt spray test is therefore enabling quick comparisons to be made between actual and expected.

Most commonly, the time taken for to appear on the samples under test is compared to expectations, to determine whether the test is passed or failed. For this reason the salt spray test is most often deployed in a quality audit role, where, for example, it can be used to check the effectiveness of a production process, such as the surface coating of a metallic part. The salt spray test has little application in predicting how materials or surface coatings will resist in the real-world, because it does not create, replicate or accelerate real-world corrosive conditions. Is better suited to this.

Testing equipment [ ]. A salt spray cabinet The apparatus for testing consists of a closed testing cabinet/chamber, where a salt water (5% NaCl) solution is atomized by means of spray nozzle(s) using pressurized air. This produces a environment of dense salt water fog (also referred to as a mist or spray) in the chamber, so that test samples exposed to this environment are subjected to severely corrosive conditions.

Chamber volumes vary from supplier to supplier. If there is a minimum volume required by a particular salt spray test standard, this will be clearly stated and should be complied with. There is a general historical consensus that larger chambers can provide a more homogeneous testing environment. Variations to the salt spray test solutions depend upon the materials to be tested. The most common test for steel based materials is the Neutral Salt Spray test (often abbreviated to NSS) which reflects the fact that this type of test solution is prepared to a neutral pH of 6.5 to 7.2. Results are represented generally as testing hours in NSS without appearance of corrosion products (e.g.